What are five general properties of aqueous bases? b. Name some common substances that have one or more of these properties.
2 answers:
Explanation:
(a) It is known that bases are the species which tend to give hydroxide ions () when dissolved in water. Some general properties of aqueous solution of bases are as follows.
- An aqueous solution of a base will have a bitter taste.
- The color of acid-base indicators tend to change when they are added to an aqueous solution of base.
- When these solutions are touched then they feel slippery.
- When a base reacts with an acid then it tends to form salt and water.
- An aqueous solution of base is able to conduct electricity.
(b) For example, some common substances that have one or more of these properties are as follows.
An aqueous solution of NaOH is basic in nature and it is able to conduct electricity. This solution also have a slippery texture.
An aqueous solution of KOH is basic in nature and it is able to conduct electricity. This solution also have a slippery texture.
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<u>Answer:</u> The given reaction is non-spontaneous in nature.
<u>Explanation:</u>
Entropy change is defined as the difference in entropy of all the product and the reactants each multiplied with their respective number of moles.
The equation used to calculate entropy change is of a reaction is:
For the given chemical reaction:
The equation for the entropy change of the above reaction is:
We are given:
Putting values in above equation, we get:
For the reaction to be spontaneous, the Gibbs free energy of the reaction must come out to be negative.
To calculate the standard Gibbs free energy of the reaction, we use the equation:
where,
= standard Gibbs free energy = ?
= standard enthalpy change of the reaction = 665.1 kJ/mol
T = Temperature = 298.15 K
= standard entropy change of the reaction = -0.0509 kJ/K.mol
Putting values in above equation, we get:
As, the Gibbs free energy of the reaction is coming out to be positive, the reaction is non-spontaneous in nature.
Hence, the given reaction is non-spontaneous in nature.